Oil separators used: 1. Gas leave the core and supporting the air compressor is usually the case, the air compressors oil is necessary to leave the core is greater than or equal to the selected air compressor outlet flow, prevents the use of the inhalation air fine dust filter filters the oil and gas can not leave the core of fine parting layer blocking, and then cut the disposal of oil and gas parting core flow, forming the core of early parting oil pressure is too large. In supporting the oil and gas is the most suitable parting core outlet flow of compressed air to pick more than 105%. (2) the use of oil and gas parting core life expectancy of aging oil sediment, airborne contaminants and wear particles will affect the use of oil and gas parting core life expectancy. The user is not the same, the end of the pressure is not the same requirements. In practice, the compressor of the gas pressure at the end of the core to leave 0.8-1bar, vacuum pump 0.5bar. Oil parting dirt accumulated on the core at higher oil flow will also increase. This can be used to measure the flow of sewage. Emissions directly and compressors pre parting structural design. Emissions are usually the best values ??around 1g per cubic oil. Therefore, the use of oil and gas parting core life expectancy can not be measured by time, as long as the gas pressure to leave the resolution at the end of core life expectancy. (Iii) Guaranteeing the core oil and gas parting with the use of life expectancy economic approach is to ensure protection of the lubricant is to ensure that there is a core oil and gas parting life expectancy than meets the prerequisite use. Generally speaking, the use of gas leave the core life expectancy was only a thin layer of solid particles leave precipitate (oil oxides, wear particles, etc.) constraint, the end lead to elevated pressure. Dirt lubricants can ﹑ by replacing the air filter and oil filter replacement cycle to abide oil cut. This approach would allow access to the oil and gas leave dirt on the core kept to a minimum, help extend protection ﹑ protection period. Selection on hydrocarbon oils using Life parting core has a very large number of links. Use only those which have been agreed ﹑ aging and insensitive to water lubricant. Poor antioxidant lubricant does not apply, even if the operating time is shorter, will occur similar to a viscous jelly-like precipitate, blocking the gas leave the core. Higher operating temperatures will accelerate the aging of oil, so it is required to cooling air flow and cooler grime incur contentedly attention. When replacing the engine oil, used oil shall completely drained to prevent new oil contaminated oil between old and perhaps new ﹑ incompatible. Because very few cases will also present in ambient air mixed gas impurities incurred lubricants premature aging.